CAD is a set of 51 neutron, 25 gamma-ray group albedo data for the following four materials:
1) 12 inches of water.
2) 12 inches of ordinary concrete.
3) 9 inches of carbon steel (SA508).
4) 1/2 inches of steel over 12 inches of concrete.

The differential angular albedoes are a function of the five inci- dent polar directions and 30 reflected directions.